KR101171931B1 - Method for inclining test of ship - Google Patents

Method for inclining test of ship Download PDF

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KR101171931B1
KR101171931B1 KR20100136197A KR20100136197A KR101171931B1 KR 101171931 B1 KR101171931 B1 KR 101171931B1 KR 20100136197 A KR20100136197 A KR 20100136197A KR 20100136197 A KR20100136197 A KR 20100136197A KR 101171931 B1 KR101171931 B1 KR 101171931B1
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South Korea
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ballast
overboard
pipe
pipes
ballast tank
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KR20100136197A
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Korean (ko)
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KR20120074382A (en
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조유용
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대우조선해양 주식회사
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  • General Physics & Mathematics (AREA)
  • Loading And Unloading Of Fuel Tanks Or Ships (AREA)
  • Fluid Mechanics (AREA)

Abstract

An object of the present invention is to provide a method for performing a simpler and more economical inclination test by transferring the ballast number stored in the ballast tank to the left / right side by using the piping system provided on the ship.
The present invention for achieving the above object is to install the overboard piping 14 to reach the upper deck 12 from the left and right side ballast tank 10, respectively, the left and right side overboard piping 14 The drain pipe 16 is installed on the upper deck 12 so as to connect the gaps, and the opening and closing control valve 18 is detachably installed in the drain pipe 16, and the opening and closing control valve 18 is separated. The temporary pipes 20 are respectively connected to the drain pipe 16, and the outlets of the temporary pipes 20 are respectively inserted into hatch 22 inlets communicating with the opposite ballast tanks 10, respectively. Separate the valve 18 from the drain pipe 16, and then selectively operate the main line pump installed in the overboard pipe 14, so that the number of ballasts stored in the ballast tank 10 on either side of the left or starboard. Inside the ballast tank (10) It transports.

Figure R1020100136197

Description

Method for inclining test of ship

The present invention relates to a method of inclination test of a ship using the ballast number, more specifically, the ballast number stored in the left / star ballast tank of the hull intersects between the left / starboard using the existing piping system provided on the ship. The present invention relates to a ship's inclination test method that can prevent various safety accidents that may occur during the inclination test and also greatly reduce the time and cost required for the test.

In general, ships undergo an inclining test and a deadweight test during the launching phase. In particular, the inclination test is carried out to determine the center of gravity and the light weight of the built ship for the purpose of verifying the planned load capacity and stability at the beginning of the design after construction.

In this case, the center of gravity means the longitudinal center of gravity of the ship (LCG), the transverse center of gravity (TCG), and the vertical center of gravity (VCG). This inclination test is implemented by repeatedly moving the weight of the solid body (solid sliding weight) such as concrete structure to the left / starboard of the hull to induce a transverse slope.

However, in the case of a large ship, it is not possible to induce the lateral inclination for the inclination test by using a weight such as a concrete structure to use the number of ballasts stored in the ballast tank, conventionally using the ballast system (BALLAST SYSTEM) of the ship If the ballast system could not transfer the ballast by itself, a separate submersible pump was installed in the left / right ballast tank, and the ballast water was transferred to the left / right side according to the operation of the submersible pump. The inclination test was conducted by sequentially transferring each.

However, this method of inclination test requires lifting when a large and heavy submersible pump is installed or removed in a ballast tank, so that there is a risk of various safety accidents, and the time required for operating a crane is excessive. Retirement has a problem.

Accordingly, the present invention has been devised in view of the above-mentioned matters, and by using the piping system provided on the ship, the ballast number stored in the ballast tank can be transferred to the left / right side to perform a simpler and more economical inclination test. The aim is to provide a new method of inclination testing that allows for this.

The present invention for achieving the above object, the step of installing each of the overboard pipes from the left / star side ballast tank to the upper deck, drain pipes on the upper deck to connect between the left / star side overboard piping Installing the opening and closing control valves in the drainage pipes; and connecting the temporary pipes to the drainage pipes from which the opening and closing control valves are separated. Respectively inserting into the hatch inlet communicating with the tank, separating the on / off regulating valve from the drain pipe, and selectively operating a main line pump installed in the overboard pipe inside the left / right side ballast tanks; The number of ballasts stored in the ballast tanks on either side of the left / right side may be And a step of draining the pipe and the pipe through the board and the temporary transfer pipe into the other side of the ballast tank and the other terminal.

Another embodiment of the present invention for achieving the above object is the step of installing each of the overboard piping to reach the upper deck from the left / right side ballast tank, the removable control valve is installed in the overboard piping respectively detachable And installing ballast pipes for the transfer of ballast water into the left / right side ballast tanks, respectively connecting the overboard pipes and the ballast pipes in the left / right side ballast tanks. Connecting the left / right side ballast pipes to main line pipes to mutually communicate between the left / right side ballast tanks, separating the open / close control valves from the overboard pipes, and the left / right side ballast tanks. By selectively operating the main line pump installed in the overboard piping inside, The other main line piping the ballast water stored inside the opposite side of the ballast tank and piping the ballast water and a step of conveying to the interior of the ballast tanks to which the main line pumps driven via the board over the pipe.

In the present invention, when the inclination test is carried out after the construction of the ship can be used to induce lateral inclination using a heavy material such as a concrete structure, the ballast number stored in the ballast tank is starboard or starboard at the port through the piping system provided on the ship Since the transverse slope can be generated by cross-transferring from the port to the port, the inclination test can be performed more easily.

In addition, the present invention can exclude the occurrence of various safety accidents that may occur by transporting a heavy concrete structure in the conventional inclination test, in particular required for the inclination test through the transfer of the ballast number using the piping system of the ship. This can significantly reduce the time and cost of doing so.

In addition, the present invention can provide a slope test method suitable for each ship having a system capable of exchanging ballast between the left and the starboard and a ship having a system capable of draining only in the piping system, thus achieving the desired purpose. It allows you to.

1 is a plan view showing a piping system installed on the upper deck to explain an embodiment of a method of inclination test of a ship according to the present invention.
Figure 2 is a plan sectional view showing a piping system installed inside the ballast tank in order to explain another embodiment of the inclination test method of the ship according to the present invention.
Figure 3 is a side cross-sectional view showing an arrangement of the overboard piping shown in FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying exemplary drawings.

The inclination test method of the ship according to an embodiment of the present invention is applied to a piping system that can implement only drainage, as shown in FIG.

The left and right side ballast tanks 10 of the hull are respectively provided with overboard piping 14 arranged in a vertical direction to reach the upper deck 12, and the left and right side ballast tanks 10 Internally, the main line pump is connected to the overboard pipe 14 for the transfer of ballast water.

The outlet portion of the left / right side overboard pipe 14 is arranged transversely from the upper deck 12 and connected to a drain pipe 16 for outboard drainage of ballast water. The drain pipe 16 is provided with an opening and closing control valve 18 for adjusting the flow of the ballast water on the left / right side, respectively, the opening and closing control valve 18 with respect to the drain pipe 16 It is detachably installed through the pipe connection member of flanges.

In ships equipped with such a piping system, the slope test is carried out as follows. First, the opening and closing control valves 18 installed on the left and right sides of the drain pipe 16 in the upper deck 12 are disassembled and separated from the drain pipe 16.

Subsequently, one end of the temporary pipe 20 is connected to the drain pipe 16 from which the open / close control valve 18 is separated. In this case, it is preferable that the temporary pipe 20 connected to the drain pipe 16 avoids interference with various equipments installed on the upper deck 12 by using flexible hoses separately provided.

Subsequently, the other end side discharge ports of the temporary pipe 20 are inserted into the inlet of the hatch 22 communicating with the ballast tank 10 located on the opposite side, respectively. That is, the discharge port of the temporary pipe 20 installed on the port side in the upper deck 12 communicates with the inside of the starboard side ballast tank 10 through the starboard side hatch 22, and on the contrary, the temporary pipe ( The discharge port 20 is in communication with the inside of the port side ballast tank 10 through the port side hatch 22.

Subsequently, the main line pump installed in each of the overboard pipes 14 is selectively operated in the left and right side ballast tanks 10, and the number of ballasts stored in either of the left and right ballast tanks 10 is increased. The overboard pipe 14, the drain pipe 16, and the temporary pipe 20 are transferred to the other side of the ballast tank 10 on the other side. That is, if only the main pump installed in the overboard piping 14 in the port side ballast tank 10 operates, the number of ballasts stored in the port side ballast tank 10 is increased from the port side overboard piping 14 and the upper deck ( 12 is transferred to the starboard side ballast tank 10 through the starboard side hatch 22 via the drain pipe 16 and the temporary pipe 20. In the opposite case, the ballast water is moved in the same manner.

When the process is sequentially performed, the ballast number stored in the ballast tank 10 on either side of the left / starboard is opposite to the other side via the overboard pipe 14, the drain pipe 16, and the temporary pipe 20. Since it can be transported into the ballast tank 10, the inclination test that can cause lateral inclination in the ship can be performed.

Therefore, if the inclination test method described above is applied to the ship, it is not necessary to install a large weight submersible pump inside the ballast tank 10 during the transfer of the ballast number for the inclination test. Occurrence can be more actively excluded.

The inclination test method of the ship according to another embodiment of the present invention is applied to the piping system that can implement the alternating ballast number to the left / right side as shown in Figure 2 and FIG.

The left and right side ballast tanks 10 of the hull are respectively provided with overboard piping 14 arranged in a vertical direction to reach the upper deck 12, and the left and right side ballast tanks 10 Inside the ballast pipes 24 for the transfer of the ballast water is provided separately. At this time, the overboard pipe 14 is branched from the ballast pipe 24 and connected.

The left and right side ballast tanks 10 are provided with opening and closing control valves 18 for controlling the flow of the main line pump 26 and the ballast water in the path of the overboard pipe 14, respectively. At this time, the opening and closing control valve 18 is detachably installed via the pipe connecting member of the flanges with respect to the overboard pipe (14).

The outlet portion of the left / right side overboard pipe 14 in the upper deck 12 is connected with a drain pipe 16 for outboard drainage of ballast water. The left / right side ballast pipes 24 are connected to each other by the main line pipes 28 arranged in the transverse direction inside the hull so that the number of ballasts can be exchanged with each other. In the figure, reference numeral 30 denotes a watertight bulkhead for partitioning the ballast tank 10 in the hull, and 32 denotes a bottom of the hull.

In ships equipped with such a piping system, the slope test is carried out as follows. First, opening and closing adjustment detachably installed in the overboard piping 14 branched from the ballast piping 24 in the left / right side ballast tank 10 and connected to the drain pipe 16 of the upper deck 12. The valve 18 is disassembled and separated from the overboard piping 14, respectively.

Subsequently, the main line pump 26 installed in the overboard piping 14 is selectively operated in any one ballast tank 10 of the left and right side ballast tanks 10, and the left and right side ballasts. In the tank 10, the ballast water stored in the opposite ballast tank 10 on the other side is sucked in. At this time, the number of ballasts stored in the opposite ballast tank 10 is moved to the ballast tank 10 of the main pump 26 via the ballast pipe 24, the main line pipe 28, and the overboard pipe 14. It is transferred inside.

That is, if only one main line pump 26 of the main line pump 26 installed in each of the overboard pipes 14 in the left / right side ballast tank 10 is driven, the other side ballast tank 10 of the other The number of ballasts stored in the ()) is sequentially the ballast pipe 24 and the overboard pipe 14 on the opposite ballast pipe 24 and the main line pipe 28 and the ballast tank 10 side in which the main line pump 26 was driven. Via the site where the on-off control valve 18 is removed, the ballast tank 10 is driven into the ballast tank 10 which drives the main line pump 26. In the opposite case, the ballast water is moved in the same manner.

When the series is sequentially performed, the number of ballasts stored in the ballast tank 10 on either of the left and right sides is passed through the ballast pipe 24, the main line pipe 28, and the overboard pipe 14 to the other side. Since it can be transported into the ballast tank 10 on the opposite side of the ship can be inclined test that can cause transverse slope can be performed.

Therefore, if the inclination test method described above is applied to the ship, it is not necessary to install a large weight submersible pump inside the ballast tank 10 during the transfer of the ballast number for the inclination test. Occurrence can be more actively excluded.

In addition, the inclination test method of the present invention has the trouble of dismantling and re-installing the opening and closing control valve 18 in the ballast tank 10, the main line pump 26 is more efficient than the separate submersible pump Since the time required to transfer the ballast water can be greatly reduced, the total time required for the inclination test can be greatly reduced.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be construed as limited to the particular details of the embodiments set forth herein. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the appended claims.

10-ballast tank 12-top deck
14-Overboard Tubing 16-Drain Tubing
18-opening and closing valve 20-temporary piping
22-hatch 24-ballast piping
26-mains pump 28-mains piping
30-Watertight Bulkheads 32-Bottom

Claims (4)

Installing each of the overboard pipes 14 from the left / right side ballast tanks 10 to the upper deck 12;
Installing a drain pipe (16) on the upper deck (12) so as to connect between the left and right side overboard pipes (14);
Detachably installing opening / closing control valves 18 in the drain pipe 16;
Connecting temporary pipes 20 to the drain pipes 16 from which the open / close control valve 18 is separated;
Inserting the outlets of the temporary pipes 20 into the inlets of the hatch 22 communicating with the opposite ballast tanks 10, respectively;
Separating the open / close control valves 18 from the drain pipes 16, respectively; And
By selectively operating the main line pump installed in the overboard pipe 14 in the left / right side ballast tank 10, the number of ballasts stored in either ballast tank 10 in the left / right side is overboard. Method of inclination test of the ship comprising the transfer to the other ballast tank (10) on the other side through the pipe (14) and the drain pipe (16) and the temporary pipe (20). The method according to claim 1,
The temporary pipe 20 is a tilt test method of the ship, characterized in that using a flexible hose. Installing each of the overboard pipes 14 from the left / right side ballast tanks 10 to the upper deck 12;
Detachably installing opening / closing control valves 18 in the overboard piping 14;
Installing ballast pipes (24) in each of the left and right side ballast tanks (10) for the transfer of ballast water;
Connecting the overboard piping (14) and the ballast piping (24) in the left / right side ballast tanks (10), respectively;
Connecting the left / right side ballast pipes (24) to main line pipes (28) to mutually communicate between the left / right side ballast tanks (10);
Separating the open / close control valves 18 from the overboard pipes 14; And
The main line pump 26 installed in the overboard pipe 14 is selectively operated in the left / right side ballast tank 10 so that the number of ballasts stored in the other ballast tank 10 on the other side of the main line pipe is increased. (28) and the inclination test method of the ship comprising the step of transferring the ballast tank (24) and the ballast tank (10) is driven through the overboard pipe (14). The method according to claim 3,
Said overboard piping (14) in said left / right side ballast tank (10) is inclined test method of the ship, characterized in that each branched to the ballast piping (24).
KR20100136197A 2010-12-28 2010-12-28 Method for inclining test of ship KR101171931B1 (en)

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CN112098222A (en) * 2020-08-11 2020-12-18 沪东中华造船(集团)有限公司 LNG ship ballast tank strength test method

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59206284A (en) 1983-05-06 1984-11-22 Sumitomo Heavy Ind Ltd Attitude control method for preventing shipwreck of moored floating marine construction
JPS6264690A (en) 1985-09-17 1987-03-23 Nippon Kokan Kk <Nkk> Ballast device for center of gravity assesment test for floating structures such as marine vessel and the like

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59206284A (en) 1983-05-06 1984-11-22 Sumitomo Heavy Ind Ltd Attitude control method for preventing shipwreck of moored floating marine construction
JPS6264690A (en) 1985-09-17 1987-03-23 Nippon Kokan Kk <Nkk> Ballast device for center of gravity assesment test for floating structures such as marine vessel and the like

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